On Thu, 14 Feb 2008, vichy wrote:
> Dear all:
> I list the initial sequences that I observed from source code.
> If I get something wrong, please let me know.
>
> Suppose I get 3 devices connected to a host, A, B and C.
> A plugs in.
> We use QH with device-address = 0, ep = 0 to get A's device d
---
>From: Alan Stern [mailto:[EMAIL PROTECTED]
>Sent: Tuesday, February 12, 2008 1:44 AM
>To: Pandita, Vikram
>Cc: vichy; linux-usb@vger.kernel.org
>Subject: RE: Some Questions about QHD
>
>On Mon, 11 Feb 2008, Pandita, Vikram wrote:
>
>> >> 2. What is the "
he default and least QH to
get every device's device descriptor, right?
Appreciate your help,
vichy
-Original Message-
From: Alan Stern [mailto:[EMAIL PROTECTED]
Sent: Tuesday, February 12, 2008 1:44 AM
To: Pandita, Vikram
Cc: vichy; linux-usb@vger.kernel.org
Subject: RE: Some Quest
On Monday 11 February 2008, Alan Stern wrote:
> > 2. What is the "device address" used for in QH?
>
> There is no "device address" field in a QH -- at least, there isn't in
> uhci-hcd or ehci-hcd. Maybe other controller drivers do have such a
> field.
There *is* a device address field in EHCI,
On Mon, 11 Feb 2008, Pandita, Vikram wrote:
> >> 2. What is the "device address" used for in QH?
> >
> >There is no "device address" field in a QH -- at least, there isn't in
> >uhci-hcd or ehci-hcd. Maybe other controller drivers do have such a
> >field.
>
> I have a doubt -
> Referring to ehc
>Sent: Monday, February 11, 2008 8:51 PM
>> Dear all:
>
>> 2. What is the "device address" used for in QH?
>
>There is no "device address" field in a QH -- at least, there isn't in
>uhci-hcd or ehci-hcd. Maybe other controller drivers do have such a
>field.
I have a doubt -
Referring to ehci sp
On Mon, 11 Feb 2008, vichy wrote:
> Dear all:
> My questions are list below:
> 1. Each QHD is assigned to 1 endpoints, right?
> Ex: if some device has 3 endpoints, 0,1 and 2, and there must at least 3
> QHDs.
What is a QHD? Do you really mean QH?
Each QH is assigned to one endpoint.
> 2. Wha
